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BOILER 0R STEAM GENERATOR.

' No. 524,391. v Patented Aug. 14, 1394.

c0 Pumoumn" wasumoron a 1.

" UNITED STATES PATENT OFFICE.

CHARLES D. MOSHER,

OF NEW YORK, N. Y.

BOILER OR STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 524,391, dated August14,1 894.

V Application filed January 7,1393. Serial No. 457.603. (No model-) ToaZZ whom it may concern.-

Beit known that I, OHARLEsD. MOSHER,

of New York city, in the county of New York and State of New York, haveinvented certain new and useful Improvements in Boilers orSteam-Generators, of which the following is a specification.

This invention relates to that class of boilers or steam generators, inwhich a water drum or receptacle located at or near the level of thegrate is connected by a plurality of tubes with a steam drum orreceptacle 1ocated at a higher point, the said tubes being arranged sothat theircontents will be subjected to the heat of the fire, as shownin Letters Patent of the United States, No. 432,7 60, granted to me July22, 1890. 'In'the generator shown in said patent, two water drums andtwo steam drums are employed, the drums extending lengthwise of thefurnace.

Mypresent invention has for its object to provide a generator of theclass above indi- 'cated, of more compact and less expensiveconstruction than those heretofore made, and to this end the inventionconsistsin the im: provements which I will now proceed to describe andclaim.

Of the accompanying drawings, forming part of this specification: Figure1 represents -a front elevation of my improved boiler, a

portion of the casing being shown in section.

Fig. 2 represents a longitudinal section on line 22, Fig. 1. Fig. 3represents a top plan view, showing a portion of the casing in section.Fig. 4 shows a detail perspective sectional view illustrative of aseparator device employed in the steam drum.

The same letters and numerals of reference indicate the same parts inall the figures.

In the drawings: a represents the grate of the furnace or fire-box, thesame being contained in a-suitable casing, composed of the sides 2 2,front end 3, rear end 4 and top 5.

22 represents the water drum, which extends across the fire-box at oneend of the grate, the lower side of the drum being preferably at or nearthe level of the top of the grate.

0 represents the steam drum, which is 10- cated'at the opposite end ofthe fire-box from the water drum and at a higher point. The

steam and water drums are substantially parallel with each other, andboth are arranged at right angles to the direction of the length.

d d 01 represent the group of tubes which connect the upper portion ofthe water drum with the upper portion of the steam drum.

Said tubes are bent to form. loops, each of which, occupies a verticalplane extending lengthwise of the fire-box,

the tubes being bent so that their lower portionsare inclined from thewater drum toward the front end of the fire-box, while their upperportions ex-,

tend in a substantially horizontal, or if preferred slightly inclineddirection along the upper portion'of the casing, their intermediateportions being inclined upwardly from casing, all as and constitute aclose wall of. tubes, extend ing from the front wall of the casing backto the point f, from which point to the steam drum the tubes (1 areseparated by spaces e The tubes at at the opposite side of the group arearranged in close proximity to each other, and form a closed wall oftubes extending from a point near'the water drum nearly to the steamdrum, the ends of the tubes 61' that .join the steam drum beingseparated by spaces 6 which permitthe esoapeof the products ofcombustion to the stackorchimney g. Thearrangeinent of the tubes inloops, each occupying avertical plane and extending lengthwise of thefire-box, enables each tube to have a considerably greater length thanhas been possible under the arrangements heretofore adopted, so that Iam enabled to obtain a much greater area of heating surface in agenerator of a given size than heretofore. This result is due to the 5products of combustion to the space between parts of the fire. The closewall formed by the tubes (1 at the back side of the group retains theproducts of combustion within the space between the tubes (1 and 01'until they reach the chimney, while the close wall formed by theintermediate inclined portions of the tubes 61 at the opposite side ofthe group interposed between the fire and the steam drum protects thelatter against injury from the heated gases in case the steam drumshould accidentally become empty. The steam drum is additionallyprotected by a partition i, which may consist of asbestos or othernonconducting material, and is suitably aifixed to the front Wall of thecasing and to the rear portion of the steam drum. The elongated openings6 between the lower inclined portions of the tubes 01 permit free accessof the the tubes d (1' along the entire length of the fire-box.

The described form of the tubesd d 01 provides a deep recess extendingbackwardly from the steam drum,as shown in Fig. 2. I utilize this recessfor the reception of a substantially horizontal hollow arm 0' extendingfrom the steam drum into said recess and communicating with the interiorof the steam drum. Said arm is preferably composed of a length oftubing, one end of which is closed,

and the other end flanged and secured by riveting or otherwise to thesteam drum. The arm is connected by bent tubes d which communicate attheir lower ends with side return pipes 12', which,with the verticalreturn pipes 12 constitute connections conducting the return water fromthe steam drum 0 to the water drum b, the horizontal pipes b extendingalong the opposite sides of the fire-box, substantially at right angleswith the steam and water drums. The tubes d are connected at their lowerends with the horizontal return pipes b, and at their upper ends withthe arm 0. The upper portions of the tubes 01 are bent inwardly, asshown in Fig. 1, the row of tubes rising from one ofthe pipes b beingbent inwardly in one direction, while the row of tubes rising from theother pipe I) are bent in the opposite direction.

It will be seen that the tubes d largely increase or add to the heatingsurface of the boiler, and obviate the necessity of usingfire brick atthe sides of the fire-box to protect the sides of the furnace. The steamgenerated in the tubes 01 passes to the steam drum through the arm a.

The steam drum is provided with a steam separator, which comprises apocket It, affixed to the interior of the steam drum, and

a scroll-shaped continuation or extension of said pocket, composed of aseries of slats 7c separated by slots or openings and an imperforateinner portion k The pocket It is closed at its bottom and ends, and isarranged to receive all the steam and water delivered by the tubes. Theslotted part of the scroll communicates with the upper edge of thepocket, and receives steam and water therefrom, and constitutes ascroll-shaped passage, leading to a steam-pipe m, which conducts steamfrom the generator to the engine. The steam, in passing through theslotted portions of the scroll, parts with the entrained water bycentrifugal action, the water being thrown outwardly and escapingthrough the slots, the steam reaching the imperforate inner portion ofthe scroll and passing from thence'through the pipe m.

I 'claim- 1. In a boiler or steam generator, the combination of afurnace or fire box, a water drum located at the rear end of the firebox, a steam drum located at the front end of the fire box, said drumsextending across the fire box, a group of curved tubes connecting theupper portion of the water drum with the upper portion of the steamdrum, said tubes being bent to form loops disposed in vertical planesextending lengthwise of the fire box, return pipes extending verticallydownward from the steam drum alongthe front of the fire box andhorizontally along the sides of the fire box to the water drum, and sidetubes springing from the horizontal portion of the return-pipes andextending along the sides of the fire-box and constituting a liningtherefor as set forth.

2. In a boiler or steam generator comprising a steam drum, a water drumand tubes ends and lower edge, and is arranged to receive the steam andwater delivered by the tubes, a scroll shaped separator at the upperopen edge of said pocket, the outer portion of said separator beingcomposed of longitudinal slats separated by slots while its innerportion is continuous or imperforate, and a steam pipe extending fromthe inner portion of the separator through the wall of the steam drum,as set forth.

3. In a boiler or steam generator, the combination of a furnace orfire-box, a water drum located at one end of the same and extendingcrosswise of the fire-box, a steam drum substantially parallel with thewater drum and located at a higher point, a plurality of curvedilr 2 vsteam drum into said recess,-h0rizonta11y arname to this specification,in the presence of ranged return pipes at the sides Qftn'e fire: twosubscribing witnesses, this 27th day of box, and bent tubes connectingsaid return December,- A. D1892. 1

V pipes 'withsai'd arni, said tubes increasing CHARLES D. MOSHER. v 1 5theheaiting surface and protecting the sides Witnesses: v

pf the furnace, as set forth. 0. F. BROWN, -.In testimony whereof I havesigned my k A. D HARRISON.

